@import "./colors.scss";
$w-100:100px;

@mixin bordered {
    border: 1px solid black;
}

#app {
    width: $w-100;
    height: $w-100;
    background-color: $bk-color;
    @include bordered;
}

//群组选择器
.container {

    h1,
    h2,
    h3 {
        margin-bottom: .8em;
    }

}

nav {
    border: 1px solid black {
        left: 0px;
        right: 0px;
    }
}